diff --git a/code/game/turfs/simulated/floor/plasteel_floor.dm b/code/game/turfs/simulated/floor/plasteel_floor.dm
index c99d2f3a9a..63c883f88c 100644
--- a/code/game/turfs/simulated/floor/plasteel_floor.dm
+++ b/code/game/turfs/simulated/floor/plasteel_floor.dm
@@ -361,6 +361,7 @@
 	name = "Mainframe Floor"
 /turf/open/floor/plasteel/vault/killroom
 	name = "Killroom Floor"
+	initial_gas_mix = "n2=500;TEMP=80"
 
 /turf/open/floor/plasteel/cult
 	icon_state = "cult"